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x86: initialize io_bitmap_base on 32bit

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commit db949bba3c7cf2e664ac12e237c6d4c914f0c69d (x86-32: use non-lazy
io bitmap context switching) broke ioperm for 32bit because it removed
the lazy initialization of io_bitmap_base and did not set it to the
real bitmap offset.

[ Impact: fix non-working sys_ioperm() on 32-bit kernels ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2009-05-01 20:59:25 +02:00
parent 2f65dd475c
commit f9a196b8dc
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/cpu/common.c
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@ -1203,6 +1203,8 @@ void __cpuinit cpu_init(void)
load_TR_desc();
load_LDT(&init_mm.context);
t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
#ifdef CONFIG_DOUBLEFAULT
/* Set up doublefault TSS pointer in the GDT */
__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);